Ah I see now I did not mean any disrespect in anyway. If anything this would be a separate project from 0AD if push came to shove. Unreal currently comes with an Strategy sample game. It is more of a tower defence game (The Sample Strategy Game) than anything but It provides a good core framework for making a RTS game like 0 AD. The reason I put this forward is the following - 1. No need to worry about working on the Engine (Epic Games is literally working with the community to evolve their engine) 2. A Unified Pipeline - Use the .FBX file (Available in Blender, 3DS Max, Maya, Modo, Cinema 4D, etc.) to export animations and Static objects. 3. Source code access - Something you do not like? You would be able to change it providing you have the C++ knowledge. 4. More developers to develop 0A.D. - Unreal 4 is attracting a lot of developers both programmers, artists, and people in between. 5. You would be able to develop for Windows, Mac OSX and Linux as well as Android, IOS, and HTML5 enabled Browsers. 7. Easy to use asset workflow. 8. 20 Bucks for Source code access! That is literally a steal! It is not open source but it is possibly as open as unreal is going to get to open source. I am of the strong opinion that nothing should be put aside without it being looked at first. Which is happening here. What if Unreal does the job better than the current engine? But this is just me. I am willing to help out with 0AD regardless of the outcome.